US6909730B2 - Phase-locked loop control of passively Q-switched lasers - Google Patents
Phase-locked loop control of passively Q-switched lasers Download PDFInfo
- Publication number
- US6909730B2 US6909730B2 US10/377,978 US37797803A US6909730B2 US 6909730 B2 US6909730 B2 US 6909730B2 US 37797803 A US37797803 A US 37797803A US 6909730 B2 US6909730 B2 US 6909730B2
- Authority
- US
- United States
- Prior art keywords
- pqsl
- coupled
- phase
- controlling
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/113—Q-switching using intracavity saturable absorbers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1304—Stabilisation of laser output parameters, e.g. frequency or amplitude by using an active reference, e.g. second laser, klystron or other standard frequency source
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1312—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1307—Stabilisation of the phase
Definitions
- This invention is related to lasers and more particularly to control of Q-switched lasers.
- passive Q-switching is simpler and less expensive than acousto-optic Q-switching
- passively Q-switched lasers are unable to deliver pulses in close synchronism with an externally-applied clock frequency.
- the pulse repetition frequency is proportional to the power with which the Q-switched laser is pumped, there is no direct way to synchronously control the pulse repetition frequency of a passively Q-switched laser.
- the PQSL would have application in tasks such as electronic trimming of integrated circuits and other micromachining. Through frequency conversion, the PQSL would become a good choice for fluorescence microscopy, flow cytometry, and other biophotonic applications. This inability to be synchronous, due to the free-running characteristic of PQSLs, has limited their use.
- the PQSL may be optically coupled to a detector.
- the detector may be coupled to an input of a phase lock loop controller.
- a reference oscillator may be coupled to a reference input of the phase lock loop controller.
- An output of the phase lock loop controller may be coupled to an integrator.
- the integrator may be coupled to a means for controlling the amount of power provided to the PQSL.
- a laser diode may provide pump power to the PQSL and the integrator may be coupled to a diode controller that regulates the amount of current provided to the laser diode.
- the components above may be combined with a passively Q-switched laser in a phase lock loop controlled passively Q-switched laser (PQSL) system.
- PQSL phase lock loop controlled passively Q-switched laser
- the timing of pulses from the PQSL may be controlled relative to a signal from the reference oscillator.
- Embodiments of the present invention provide for locking the phase of Q-switched lasers over a wide range of frequencies.
- FIG. 1 is a simplified block diagram of a Q-switched laser system according to an embodiment of the present invention.
- the present invention recognizes that a passively Q-switched laser (PQSL) is equivalent to a voltage controlled oscillator (VCO).
- Voltage controlled oscillators can be used to create phase-locked loops.
- the pulse frequency response of the PQSL is a monotonic function of the applied pump power over much of its operating range, allowing the loop to be closed.
- the inventor has developed examples of such phase locked PQSL systems that demonstrate that this phase locking is possible over two full octaves of repetition rate. This can be a much larger range than is needed in display systems and other applications.
- the control circuit for a passively Q-switched laser (PQSL) 2 may include a laser diode 4 that provides pumping power to the PQSL 2 .
- the PQSL 2 may be a model ML-00005 laser from Synoptics of Charlotte, N.C. operating at 1064 nm.
- the laser diode 4 may be built into the Synoptics PQSL package. The PQSL 2 and diode 4 operate under the control of a controller 3 .
- a Model 110 laser controller from Lightwave Electronics of Mountain View, Calif., may be used to control the diode current and temperature.
- the PQSL may be powered with a commercial diode current controller such as a Model 6000 Laser Diode Controller available from Newport Corporation of Irvine, Calif.
- a detector 6 is optically coupled to the PQSL 2 and the detector 6 is coupled to an input 11 of a phase lock loop controller 10 .
- a reference oscillator 12 is coupled to a reference input 13 of the phase lock loop controller 10
- an integrator 14 is coupled to an output 15 of the phase lock loop controller 10 .
- the integrator 14 may be implemented with generic operational amplifier circuitry.
- the integrator 14 is coupled to the controller 3 , which controls an amount of pump power that the laser diode provides to the PQSL.
- the Phase Locked Lop controller 10 may be implemented on a Programmable Logic Device (PLD) available from Altera Corporation of San Jose, Calif.
- a suitable program such as PLL may implement the phase control in the Phase Locked Loop Controller 10 .
- the detector may optionally include a divide-by-2 flip-flop that receives a pulse train characterized by a pulse frequency f and produces an output pulse train characterized by a pulse frequency f/2.
- an external divide-by-2 flip-flop may be coupled between the detector 6 and the input 11 of the phase lock loop controller 10 .
- the controller 3 controls a current to the laser diode 4 , which in turn controls the amount of power provided by the laser diode 4 .
- the diode controller 3 allows the current supplied to the diode 4 to be controlled by a voltage applied to the controller 3 .
- the system 1 operates as follows.
- the integrator 14 creates a voltage that is applied to the diode controller 3 .
- the voltage from the integrator 14 controls the current supplied to the laser diode 4 .
- the laser diode current controls the power from the laser diode 4 .
- the power from the laser diode 4 determines the pulse repetition rate of the PQSL 2 .
- the control at each step is roughly linear.
- the combination of the controller 3 , the laser diode 4 arid PQSL 2 is equivalent to a Voltage Controlled Oscillator.
- the pulse repetition frequency of the PQSL 2 depends on the current driven through the laser diode 4 .
- the timing of pulses from the PQSL 2 may be controlled relative to a signal from the reference oscillator 12 .
- phase locked loop pulse repetition rate control may be used in association with lasers used for precise machining operations, such as memory repair.
- the pump power provided by the laser diode may be controlled by controlling the diode temperature. Therefore, the scope of the present invention should be determined not with reference to the above description but should, instead, be determined with reference to the appended claims, along with their full scope of equivalents.
- the appended claims are not to be interpreted as including means-plus-function limitations, unless such a limitation is explicitly recited in a given claim using the phrase “means for.”
Abstract
Description
TABLE I | |||
Peak-to-peak % Jitter between | |||
Frequency | reference & laser | ||
1/2 × F0 | 0.8% | ||
F0 | 1.6% | ||
2 × |
10% | ||
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/377,978 US6909730B2 (en) | 2002-03-19 | 2003-03-01 | Phase-locked loop control of passively Q-switched lasers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36593602P | 2002-03-19 | 2002-03-19 | |
US10/377,978 US6909730B2 (en) | 2002-03-19 | 2003-03-01 | Phase-locked loop control of passively Q-switched lasers |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030179785A1 US20030179785A1 (en) | 2003-09-25 |
US6909730B2 true US6909730B2 (en) | 2005-06-21 |
Family
ID=28454729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/377,978 Expired - Lifetime US6909730B2 (en) | 2002-03-19 | 2003-03-01 | Phase-locked loop control of passively Q-switched lasers |
Country Status (7)
Country | Link |
---|---|
US (1) | US6909730B2 (en) |
EP (1) | EP1488481B1 (en) |
JP (1) | JP4856850B2 (en) |
AT (1) | ATE494649T1 (en) |
AU (1) | AU2003228303A1 (en) |
DE (1) | DE60335611D1 (en) |
WO (1) | WO2003081731A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050018723A1 (en) * | 2003-05-14 | 2005-01-27 | Masayuki Morita | Method of stabilizing laser beam, and laser beam generation system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7391794B2 (en) * | 2005-05-25 | 2008-06-24 | Jds Uniphase Corporation | Injection seeding of frequency-converted Q-switched laser |
JP4916352B2 (en) * | 2007-03-16 | 2012-04-11 | 三菱電機株式会社 | Radar equipment |
JP2012142523A (en) * | 2011-01-06 | 2012-07-26 | Mitsubishi Electric Corp | Passive q switch laser device |
US8804231B2 (en) * | 2011-06-20 | 2014-08-12 | Oewaves, Inc. | Stabilizing RF oscillator based on optical resonator |
GB2497549A (en) * | 2011-12-12 | 2013-06-19 | Thales Holdings Uk Plc | Method and apparatus for use in passive q-switching |
JP6257190B2 (en) * | 2013-07-09 | 2018-01-10 | キヤノン株式会社 | Subject information acquisition device and laser device |
CN104409960B (en) * | 2014-11-26 | 2017-08-11 | 山西大学 | A kind of automatic laser frequency regulator and method |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3609389A (en) * | 1970-01-15 | 1971-09-28 | Bell Telephone Labor Inc | Passive pulse transmission mode operation in a q-switched laser having an internal parametric oscillator |
US3764937A (en) * | 1972-04-26 | 1973-10-09 | United Aircraft Corp | Frequency controlled, passively q-switch laser |
US4329664A (en) * | 1980-06-09 | 1982-05-11 | Ali Javan | Generation of stable frequency radiation at an optical frequency |
US4572662A (en) * | 1982-11-05 | 1986-02-25 | The United States Of America As Represented By The Secretary Of The Army | Wire and wire like object detection system |
US4744650A (en) * | 1986-06-27 | 1988-05-17 | The United States Of America As Represented By The Secretary Of The Air Force | High resolution cinephotographics system |
US4749961A (en) * | 1986-03-26 | 1988-06-07 | Hitachi, Ltd. | Voltage controlled oscillator and phase-locked loop using it |
US4834945A (en) * | 1986-06-27 | 1989-05-30 | The United States Of America As Represented By The Secretary Of The Air Force | High resolution cinephotographics system pressure vessel |
US5119382A (en) * | 1990-12-24 | 1992-06-02 | Mcdonnell Douglas Corporation | Tetravalent chromium doped passive Q-switch |
US5394413A (en) * | 1994-02-08 | 1995-02-28 | Massachusetts Institute Of Technology | Passively Q-switched picosecond microlaser |
US5412673A (en) * | 1993-12-22 | 1995-05-02 | Hoya Corporation | Single longitudinal mode laser without seeding |
US5654973A (en) * | 1995-05-05 | 1997-08-05 | Hughes Electronics | Laser system using Co2+ -doped crystal Q-switch |
US5767969A (en) * | 1995-05-24 | 1998-06-16 | Sextant Avionique | Gyrometric detection method and sampled optical gyrometer to implement said method |
US5802083A (en) * | 1995-12-11 | 1998-09-01 | Milton Birnbaum | Saturable absorber Q-switches for 2-μm lasers |
US5832008A (en) * | 1997-01-24 | 1998-11-03 | Hughes Electronics | Eyesafe laser system using transition metal-doped group II-VI semiconductor as a passive saturable absorber Q-switch |
US5847816A (en) * | 1997-01-14 | 1998-12-08 | Mcdonnell Douglas Corporation | Fiber optic micro-doppler ladar system and operating method therefor |
US20010014131A1 (en) * | 1999-12-20 | 2001-08-16 | Teac Corporation | Signal processing circuit and signal processing method |
US6356128B2 (en) | 2000-05-01 | 2002-03-12 | Mitsubishi Denki Kabushiki Kaisha | Method and circuitry for supplying clock to internal circuit |
US20020158211A1 (en) | 2001-04-16 | 2002-10-31 | Dakota Technologies, Inc. | Multi-dimensional fluorescence apparatus and method for rapid and highly sensitive quantitative analysis of mixtures |
US20030048814A1 (en) * | 2001-06-13 | 2003-03-13 | Orbotech Ltd | Laser energy delivery system outputting beams having a selectable energy |
US20030118060A1 (en) * | 2001-09-24 | 2003-06-26 | Gigatera Ag | Pulse-generating laser |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE789645A (en) * | 1971-10-13 | 1973-04-04 | Shell Int Research | PROCEDURE FOR REGENERATING A DEACTIVATED HYDROKRAAK CATALYST |
JPS4948293A (en) * | 1973-04-23 | 1974-05-10 | ||
US3869680A (en) * | 1973-08-31 | 1975-03-04 | Nasa | Dually mode-locked nd:yag laser |
US4468773A (en) * | 1981-05-29 | 1984-08-28 | Seaton Norman T | Laser control apparatus and method |
GB8413502D0 (en) * | 1984-05-25 | 1984-07-04 | British Telecomm | Mode locked laser light sources |
US5077748A (en) * | 1991-04-01 | 1991-12-31 | International Business Machines Corporation | Laser system and method |
JPH08307262A (en) * | 1995-05-09 | 1996-11-22 | Matsushita Electric Ind Co Ltd | Frequency synthesizer |
SE9603288L (en) * | 1996-02-20 | 1997-08-21 | Geotronics Ab | Stabilization of a pumped laser tube |
JP3571539B2 (en) * | 1998-08-28 | 2004-09-29 | 日本電信電話株式会社 | Optical pulse generator |
US6175579B1 (en) * | 1998-10-27 | 2001-01-16 | Precision Light L.L.C. | Apparatus and method for laser frequency control |
JP2001144356A (en) * | 1999-11-11 | 2001-05-25 | Ushio Sogo Gijutsu Kenkyusho:Kk | Method of generating higher harmonic laser beam and laser device thereof |
JP2001185794A (en) * | 1999-12-22 | 2001-07-06 | Yokogawa Electric Corp | Semiconductor laser excitation solid laser |
-
2003
- 2003-03-01 JP JP2003579325A patent/JP4856850B2/en not_active Expired - Lifetime
- 2003-03-01 AU AU2003228303A patent/AU2003228303A1/en not_active Abandoned
- 2003-03-01 AT AT03726051T patent/ATE494649T1/en not_active IP Right Cessation
- 2003-03-01 DE DE60335611T patent/DE60335611D1/en not_active Expired - Lifetime
- 2003-03-01 WO PCT/US2003/007293 patent/WO2003081731A2/en active Application Filing
- 2003-03-01 US US10/377,978 patent/US6909730B2/en not_active Expired - Lifetime
- 2003-03-01 EP EP03726051A patent/EP1488481B1/en not_active Expired - Lifetime
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3609389A (en) * | 1970-01-15 | 1971-09-28 | Bell Telephone Labor Inc | Passive pulse transmission mode operation in a q-switched laser having an internal parametric oscillator |
US3764937A (en) * | 1972-04-26 | 1973-10-09 | United Aircraft Corp | Frequency controlled, passively q-switch laser |
US4329664A (en) * | 1980-06-09 | 1982-05-11 | Ali Javan | Generation of stable frequency radiation at an optical frequency |
US4572662A (en) * | 1982-11-05 | 1986-02-25 | The United States Of America As Represented By The Secretary Of The Army | Wire and wire like object detection system |
US4749961A (en) * | 1986-03-26 | 1988-06-07 | Hitachi, Ltd. | Voltage controlled oscillator and phase-locked loop using it |
US4744650A (en) * | 1986-06-27 | 1988-05-17 | The United States Of America As Represented By The Secretary Of The Air Force | High resolution cinephotographics system |
US4834945A (en) * | 1986-06-27 | 1989-05-30 | The United States Of America As Represented By The Secretary Of The Air Force | High resolution cinephotographics system pressure vessel |
US5119382A (en) * | 1990-12-24 | 1992-06-02 | Mcdonnell Douglas Corporation | Tetravalent chromium doped passive Q-switch |
US5412673A (en) * | 1993-12-22 | 1995-05-02 | Hoya Corporation | Single longitudinal mode laser without seeding |
US5394413A (en) * | 1994-02-08 | 1995-02-28 | Massachusetts Institute Of Technology | Passively Q-switched picosecond microlaser |
US5654973A (en) * | 1995-05-05 | 1997-08-05 | Hughes Electronics | Laser system using Co2+ -doped crystal Q-switch |
US5767969A (en) * | 1995-05-24 | 1998-06-16 | Sextant Avionique | Gyrometric detection method and sampled optical gyrometer to implement said method |
US5802083A (en) * | 1995-12-11 | 1998-09-01 | Milton Birnbaum | Saturable absorber Q-switches for 2-μm lasers |
US5847816A (en) * | 1997-01-14 | 1998-12-08 | Mcdonnell Douglas Corporation | Fiber optic micro-doppler ladar system and operating method therefor |
US5832008A (en) * | 1997-01-24 | 1998-11-03 | Hughes Electronics | Eyesafe laser system using transition metal-doped group II-VI semiconductor as a passive saturable absorber Q-switch |
US20010014131A1 (en) * | 1999-12-20 | 2001-08-16 | Teac Corporation | Signal processing circuit and signal processing method |
US6356128B2 (en) | 2000-05-01 | 2002-03-12 | Mitsubishi Denki Kabushiki Kaisha | Method and circuitry for supplying clock to internal circuit |
US20020158211A1 (en) | 2001-04-16 | 2002-10-31 | Dakota Technologies, Inc. | Multi-dimensional fluorescence apparatus and method for rapid and highly sensitive quantitative analysis of mixtures |
US20030048814A1 (en) * | 2001-06-13 | 2003-03-13 | Orbotech Ltd | Laser energy delivery system outputting beams having a selectable energy |
US20030118060A1 (en) * | 2001-09-24 | 2003-06-26 | Gigatera Ag | Pulse-generating laser |
Non-Patent Citations (2)
Title |
---|
Schibli, et al., "control of Q-switched mode locking by active feedback,", optics Letters, vol. 26, May, 2001, pp. 692-694. * |
Written Opinion in related International Application PCT/US03/07293. |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050018723A1 (en) * | 2003-05-14 | 2005-01-27 | Masayuki Morita | Method of stabilizing laser beam, and laser beam generation system |
Also Published As
Publication number | Publication date |
---|---|
WO2003081731A3 (en) | 2004-03-25 |
AU2003228303A1 (en) | 2003-10-08 |
US20030179785A1 (en) | 2003-09-25 |
EP1488481B1 (en) | 2011-01-05 |
EP1488481A4 (en) | 2009-11-25 |
WO2003081731A2 (en) | 2003-10-02 |
ATE494649T1 (en) | 2011-01-15 |
JP2005521317A (en) | 2005-07-14 |
JP4856850B2 (en) | 2012-01-18 |
AU2003228303A8 (en) | 2003-10-08 |
DE60335611D1 (en) | 2011-02-17 |
EP1488481A2 (en) | 2004-12-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6909730B2 (en) | Phase-locked loop control of passively Q-switched lasers | |
CN107112998B (en) | FLL Oscillator/clock with FLL control Loop | |
US5629650A (en) | Self-biased phase-locked loop | |
WO2002060062A3 (en) | Phase-locked loop with conditioned charge pump output | |
EP1178610A3 (en) | Delay circuit for ring oscillator with power supply noise compensation | |
JP2000183430A (en) | Laser pulse oscillator based on atomic frequency standard | |
US20030138005A1 (en) | Laser light source | |
TW200723706A (en) | Charge pump, phase-locked loop utilizing the charge pump to achieve compensated loop bandwidth, and related method thereof | |
US20020051509A1 (en) | Phase-locked loop | |
US4309675A (en) | Control circuit for providing a synchronized drive signal to an oscillating system | |
JPH11121854A (en) | Light source device | |
JP2002026695A (en) | Voltage controlled oscillator | |
KR20030028557A (en) | Method and apparatus for a digital clock multiplication circuit | |
US6304147B1 (en) | Method and circuit for reduced power consumption in a charge pump circuit | |
US8379285B1 (en) | Radio frequency self-regenerated locked optical oscillator | |
RU2421875C1 (en) | Quartz shock-excited oscillator | |
JP3172776B2 (en) | Atomic oscillator | |
JP5320616B2 (en) | Laser and method of generating pulsed laser radiation | |
Seidel et al. | Manipulation of Temporal Localized Structures in a VECSEL With Optical Feedback | |
KR20180049795A (en) | Microchip type laser apparatus and driving method thereof | |
KR20190071662A (en) | Microchip type laser apparatus and driving method thereof | |
Ahola et al. | A novel phase detector with no dead zone and a chargepump with very wide output voltage range | |
SU1667206A1 (en) | High-voltage power supply source | |
KR100761127B1 (en) | Circuit for phase locked loop | |
CORD | Free electron laser short pulse simulation and two-mode sideband analysis(M. S. Thesis) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LIGHTWAVE ELECTRONICS CORPORATION, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KANE, THOMAS J.;REEL/FRAME:013854/0732 Effective date: 20030227 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: JDS UNIPHASE CORPORATION, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIGHTWAVE ELECTRONICS CORPORATION;REEL/FRAME:016345/0054 Effective date: 20050729 |
|
FEPP | Fee payment procedure |
Free format text: PAT HOLDER NO LONGER CLAIMS SMALL ENTITY STATUS, ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: STOL); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
AS | Assignment |
Owner name: LUMENTUM OPERATIONS LLC, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JDS UNIPHASE CORPORATION;REEL/FRAME:036420/0340 Effective date: 20150731 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: LUMENTUM OPERATIONS LLC, CALIFORNIA Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE PATENTS LISTED ON PAGE A-A33 PREVIOUSLY RECORDED ON REEL 036420 FRAME 0340. ASSIGNOR(S) HEREBY CONFIRMS THE PATENT NUMBERS 7,868,247 AND 6,476,312 WERE LISTED IN ERROR AND SHOULD BE REMOVED;ASSIGNOR:JDS UNIPHASE CORPORATION;REEL/FRAME:037562/0513 Effective date: 20150731 Owner name: LUMENTUM OPERATIONS LLC, CALIFORNIA Free format text: CORRECTIVE ASSIGNMENT TO CORRECT INCORRECT PATENTS 7,868,247 AND 6,476,312 ON PAGE A-A33 PREVIOUSLY RECORDED ON REEL 036420 FRAME 0340. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:JDS UNIPHASE CORPORATION;REEL/FRAME:037562/0513 Effective date: 20150731 |
|
AS | Assignment |
Owner name: LUMENTUM OPERATIONS LLC, CALIFORNIA Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE PATENTS LISTED ON PAGE A-A33 PATENT NUMBERS 7,868,247 AND 6,476,312 WERE LISTED IN ERROR AND SHOULD BE REMOVED. PREVIOUSLY RECORDED ON REEL 036420 FRAME 0340. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:JDS UNIPHASE CORPORATION;REEL/FRAME:037627/0641 Effective date: 20150731 Owner name: LUMENTUM OPERATIONS LLC, CALIFORNIA Free format text: CORRECTIVE ASSIGNMENT TO CORRECT PATENTS 7,868,247 AND 6,476,312 LISTED ON PAGE A-A33 PREVIOUSLY RECORDED ON REEL 036420 FRAME 0340. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:JDS UNIPHASE CORPORATION;REEL/FRAME:037627/0641 Effective date: 20150731 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT, NEW YORK Free format text: PATENT SECURITY AGREEMENT;ASSIGNORS:LUMENTUM OPERATIONS LLC;OCLARO FIBER OPTICS, INC.;OCLARO, INC.;REEL/FRAME:047788/0511 Effective date: 20181210 Owner name: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AG Free format text: PATENT SECURITY AGREEMENT;ASSIGNORS:LUMENTUM OPERATIONS LLC;OCLARO FIBER OPTICS, INC.;OCLARO, INC.;REEL/FRAME:047788/0511 Effective date: 20181210 |
|
AS | Assignment |
Owner name: OCLARO, INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:DEUTSCHE AG NEW YORK BRANCH;REEL/FRAME:051287/0556 Effective date: 20191212 Owner name: OCLARO FIBER OPTICS, INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:DEUTSCHE AG NEW YORK BRANCH;REEL/FRAME:051287/0556 Effective date: 20191212 Owner name: LUMENTUM OPERATIONS LLC, CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:DEUTSCHE AG NEW YORK BRANCH;REEL/FRAME:051287/0556 Effective date: 20191212 |